Putnam County, Illinois
7 ZIP codes · Avg score 62/100 · Grade C · Updated 2026-06-03
Putnam County: 7 ZIP codes, mid-range safety grade.
How Putnam County Compares
How Putnam County Compares
Putnam County scores 1 points above the Illinois state average (61/100) and 6 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Putnam County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.6 (asthma 9.9%, diabetes 12.1%)
Estimated additional annual cost per homeowner: $1,247, driven primarily by energy_code_gap
Infrastructure: 0.413% avg pipe failure probability, 43% of ZIPs at high risk
72.6% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Putnam County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 2 violations. Past 5 years: 3 total (3 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,247
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,640 housing units in Putnam County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Putnam County
Remediation costs are relatively manageable for most homeowners in Putnam County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Putnam County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Putnam County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Mark | 555 | 3 |
| 2 | IL AMERICAN-PEORIA | 137,575 | 3 |
| 3 | T-l Rural Water District | 2,665 | 3 |
| 4 | Elmwood | 2,058 | 3 |
| 5 | Brimfield | 856 | 3 |
12 total water systems serve Putnam County.
All ZIP Codes in Putnam County
7 ZIP codes tracked in Putnam County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 61336 | Magnolia | 70 | B | 0 | $180K |
| 2 | 61517 | Brimfield | 69 | C | 3 | $270K |
| 3 | 61327 | Hennepin | 68 | C | 1 | $219K |
| 4 | 61326 | Granville | 63 | C | 0 | $137K |
| 5 | 61363 | Standard | 55 | C | 0 | $108K |
| 6 | 61340 | Mark | 54 | D | 3 (1 health) | $154K |
| 7 | 61335 | Mc Nabb | 53 | D | 0 | $135K |
Recommended Buyer Guides for Putnam County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 72.6% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Putnam County, Illinois
Overview
Putnam County in Illinois covers 7 ZIP codes with an average Home Safety Score of C (62/100).
3 of 7 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to Illinois water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.